Click on a day for an hourly weather forecast
The temperatures in Glastonbury in August are usually low and can range between 12°C and 20°C.
You can expect about 3 to 8 days of rain in Glastonbury during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Glastonbury in August 2025.
If you’re planning to visit Glastonbury in the near future, we highly recommend that you review the 14 day weather forecast for Glastonbury before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 2° | 8 | 20 | 3 | 80 mm | Awful | Glastonbury in January |
| February | 8° / 2° | 8 | 18 | 3 | 72 mm | Awful | Glastonbury in February |
| March | 10° / 3° | 5 | 25 | 1 | 57 mm | Ok | Glastonbury in March |
| April | 13° / 4° | 4 | 26 | 0 | 52 mm | Ok | Glastonbury in April |
| May | 16° / 7° | 5 | 26 | 0 | 60 mm | Good | Glastonbury in May |
| June | 19° / 10° | 5 | 25 | 0 | 69 mm | Good | Glastonbury in June |
| July | 21° / 12° | 5 | 26 | 0 | 71 mm | Good | Glastonbury in July |
| August | 20° / 12° | 6 | 25 | 0 | 76 mm | Good | Glastonbury in August |
| September | 18° / 10° | 4 | 26 | 0 | 50 mm | Good | Glastonbury in September |
| October | 15° / 8° | 7 | 24 | 0 | 97 mm | Ok | Glastonbury in October |
| November | 10° / 5° | 8 | 22 | 0 | 90 mm | Bad | Glastonbury in November |
| December | 8° / 4° | 8 | 21 | 2 | 95 mm | Awful | Glastonbury in December |